1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | * Copyright (c) 2015 Tom Herbert <tom@herbertland.com> |
4 | */ |
5 | |
6 | #ifndef __ILA_H |
7 | #define __ILA_H |
8 | |
9 | #include <linux/errno.h> |
10 | #include <linux/ip.h> |
11 | #include <linux/kernel.h> |
12 | #include <linux/module.h> |
13 | #include <linux/socket.h> |
14 | #include <linux/skbuff.h> |
15 | #include <linux/types.h> |
16 | #include <net/checksum.h> |
17 | #include <net/genetlink.h> |
18 | #include <net/ip.h> |
19 | #include <net/protocol.h> |
20 | #include <uapi/linux/ila.h> |
21 | |
22 | struct ila_locator { |
23 | union { |
24 | __u8 v8[8]; |
25 | __be16 v16[4]; |
26 | __be32 v32[2]; |
27 | __be64 v64; |
28 | }; |
29 | }; |
30 | |
31 | struct ila_identifier { |
32 | union { |
33 | struct { |
34 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
35 | u8 __space:4; |
36 | u8 csum_neutral:1; |
37 | u8 type:3; |
38 | #elif defined(__BIG_ENDIAN_BITFIELD) |
39 | u8 type:3; |
40 | u8 csum_neutral:1; |
41 | u8 __space:4; |
42 | #else |
43 | #error "Adjust your <asm/byteorder.h> defines" |
44 | #endif |
45 | u8 __space2[7]; |
46 | }; |
47 | __u8 v8[8]; |
48 | __be16 v16[4]; |
49 | __be32 v32[2]; |
50 | __be64 v64; |
51 | }; |
52 | }; |
53 | |
54 | #define CSUM_NEUTRAL_FLAG htonl(0x10000000) |
55 | |
56 | struct ila_addr { |
57 | union { |
58 | struct in6_addr addr; |
59 | struct { |
60 | struct ila_locator loc; |
61 | struct ila_identifier ident; |
62 | }; |
63 | }; |
64 | }; |
65 | |
66 | static inline struct ila_addr *ila_a2i(struct in6_addr *addr) |
67 | { |
68 | return (struct ila_addr *)addr; |
69 | } |
70 | |
71 | struct ila_params { |
72 | struct ila_locator locator; |
73 | struct ila_locator locator_match; |
74 | __wsum csum_diff; |
75 | u8 csum_mode; |
76 | u8 ident_type; |
77 | }; |
78 | |
79 | static inline __wsum compute_csum_diff8(const __be32 *from, const __be32 *to) |
80 | { |
81 | __be32 diff[] = { |
82 | ~from[0], ~from[1], to[0], to[1], |
83 | }; |
84 | |
85 | return csum_partial(buff: diff, len: sizeof(diff), sum: 0); |
86 | } |
87 | |
88 | static inline bool ila_csum_neutral_set(struct ila_identifier ident) |
89 | { |
90 | return !!(ident.csum_neutral); |
91 | } |
92 | |
93 | void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p, |
94 | bool set_csum_neutral); |
95 | |
96 | void ila_init_saved_csum(struct ila_params *p); |
97 | |
98 | struct ila_net { |
99 | struct { |
100 | struct rhashtable rhash_table; |
101 | spinlock_t *locks; /* Bucket locks for entry manipulation */ |
102 | unsigned int locks_mask; |
103 | bool hooks_registered; |
104 | } xlat; |
105 | }; |
106 | |
107 | int ila_lwt_init(void); |
108 | void ila_lwt_fini(void); |
109 | |
110 | int ila_xlat_init_net(struct net *net); |
111 | void ila_xlat_exit_net(struct net *net); |
112 | |
113 | int ila_xlat_nl_cmd_add_mapping(struct sk_buff *skb, struct genl_info *info); |
114 | int ila_xlat_nl_cmd_del_mapping(struct sk_buff *skb, struct genl_info *info); |
115 | int ila_xlat_nl_cmd_get_mapping(struct sk_buff *skb, struct genl_info *info); |
116 | int ila_xlat_nl_cmd_flush(struct sk_buff *skb, struct genl_info *info); |
117 | int ila_xlat_nl_dump_start(struct netlink_callback *cb); |
118 | int ila_xlat_nl_dump_done(struct netlink_callback *cb); |
119 | int ila_xlat_nl_dump(struct sk_buff *skb, struct netlink_callback *cb); |
120 | |
121 | extern unsigned int ila_net_id; |
122 | |
123 | extern struct genl_family ila_nl_family; |
124 | |
125 | #endif /* __ILA_H */ |
126 | |